* {
  background-color: #c4ecff;
  font-family: helvetica;
}

mark {
  background-color: #f7f5a3;
}

#navbar {
  position: fixed;
  width: 260px;
  height: 100%;
  border-right: solid;
  border-color: #000000;
  border-width: 2px;
  top: 0px;
  left: 0px;
}

.navbar-divider {
  border: solid;
  border-width: 1px;
  border-color: #000000;
}

#navbar ul {
  list-style: none;
  text-align: left;
  padding: 0px;
  margin: auto;
}

#navbar header {
  text-align: center;
  background-color: #81bcd8;
  padding: 8px 0px;
}

#navbar li {
  margin: 8px 0px;
  padding-left: 15px;
}

a {
  text-decoration-line: none;
}
a:visited {
  color: #000000;
}

.main-section {
  margin-left: 300px;
  margin-bottom: 30px;
}

header {
  font-size: 30px;
  font-weight: 600;
}

@media (max-width: 1100px) {
  #main-doc {
    width: 500px;
  }
}